HKM ZKB-1 Portable Oil-Free Piston Vacuum Pump

Overview

The HKM ZKB-1 Portable Oil-Free Piston Vacuum Pump is a compact, self-contained negative-pressure generation system engineered for precision filtration and sample preparation in regulated laboratory environments. It operates on the principle of reciprocating piston displacement within a sealed, lubrication-free chamber—eliminating oil vapor carryover and ensuring contamination-free vacuum conditions essential for biological, pharmaceutical, and forensic applications. Unlike rotary vane or diaphragm pumps, the ZKB-1 employs a single-stage, unidirectional oil-free piston mechanism that delivers stable suction pressure without internal positive-pressure transients, making it especially suitable for membrane filtration workflows where sample integrity and operator safety are paramount. Its design conforms to fundamental operational constraints defined in IEC 61000-6-3 (EMC emission standards) and meets mechanical safety requirements per IEC 61010-1 for laboratory electrical equipment.

Key Features

• Oil-free piston architecture ensures zero hydrocarbon contamination—critical for sterility testing, endotoxin analysis, and USP microbial enumeration.
• Adjustable vacuum regulation via integrated pressure control allows continuous, stepless modulation of suction force—enabling optimal filtration rates across variable sample viscosities (e.g., viscous food extracts or polymerized biological suspensions).
• Transparent, autoclavable polycarbonate (PC) collection bottle with 1000 mL standard capacity—compatible with optional 2000/3000/4000 mL configurations for high-throughput batch processing.
• Thermally managed intermittent-duty cycle: rated for ≤30 minutes continuous operation at 50% duty cycle, preventing motor thermal overload during extended assays.
• Low-noise operation (≤60 dB[A]) achieved through vibration-damped housing and optimized piston damping—suitable for shared lab spaces and cleanroom-adjacent workbenches.
• Integrated 0.5 A slow-blow fuse (RF1 φ5×20 mm) and wide-input voltage tolerance (220 V ±10%, 50 Hz) ensure robust performance under fluctuating mains conditions common in regional research facilities.

Sample Compatibility & Compliance

The ZKB-1 is validated for use with standard 47 mm and 142 mm membrane filters (cellulose acetate, mixed ester, PVDF, and PTFE), supporting ASTM D1129, ISO 8573-1 (Class 4 particulate compliance), and CLSI M22-A3 methodologies for environmental and clinical specimen processing. Its absence of oil-based lubricants eliminates risk of filter clogging or analyte adsorption—making it compliant with GLP documentation requirements for trace-level contaminant studies. The unit does not generate explosive atmospheres and must not be operated in Class I, Division 1 hazardous locations per NEC Article 500. It is not intrinsically safe and therefore excluded from direct use with flammable solvents or volatile organic compounds.

Software & Data Management

As a standalone analog vacuum source, the ZKB-1 operates without embedded firmware or digital interfaces. All operational parameters—including runtime, pressure setpoint, and duty-cycle status—are monitored manually via external analog gauges or third-party pressure transducers. For audit-trail compliance in GMP-regulated settings (e.g., FDA 21 CFR Part 11), users may integrate the pump into validated vacuum manifolds equipped with calibrated pressure loggers (e.g., Validyne DP15 or Omega PX409 series) connected to LIMS-compatible data acquisition systems. No proprietary software or cloud connectivity is provided; configuration remains fully manual and calibration-transparent.

Applications

• Membrane filtration for microbiological assay (e.g., total viable count, coliform detection per ISO 9308-1 and APHA Standard Methods 9222B).
• Vacuum-assisted solvent removal in preparative HPLC fraction collection and lyophilization pre-concentration steps.
• Forensic evidence processing—including bloodstain filtration, gunshot residue (GSR) particle recovery, and trace DNA extraction workflows.
• Quality control in food safety labs performing pathogen isolation (e.g., Salmonella, E. coli O157:H7) using ISO 6579 and ISO 16654 protocols.
• Pharmaceutical QC labs conducting filter integrity testing (forward flow, bubble point) per ASTM F838-22 and USP .

FAQ

Is the ZKB-1 certified for use in ISO Class 5 cleanrooms?
No—while its oil-free design prevents airborne hydrocarbon contamination, the unit lacks HEPA-filtered exhaust and static-dissipative housing required for ISO 14644-1 Class 5 certification. It may be used outside the cleanroom envelope for upstream sample prep.
Can the pump be used with aggressive solvents like acetone or chloroform?
No—the polycarbonate collection bottle and internal elastomer seals are incompatible with halogenated and ketonic solvents. Only aqueous, mildly acidic/basic, or alcohol-based solutions are recommended.
Does the ZKB-1 support continuous 24/7 operation?
No—it is rated for intermittent service only: maximum 30 minutes ON followed by ≥30 minutes OFF to maintain thermal stability and bearing longevity.
What maintenance intervals are recommended?
Piston seal inspection every 500 operating hours; replacement recommended at 1000 hours or if vacuum decay exceeds 15% over 2 minutes at full load.
Is calibration documentation included with shipment?
A factory-verified pressure output report (at −0.08 MPa, 22 L/min) is supplied. Full metrological calibration per ISO/IEC 17025 requires third-party service using NIST-traceable reference manometers.